Diagnostic Test

CHECK DTC IS ACTIVE
1. Turn the ignition on.
2. With the scan tool, create a Vehicle Scan Report and attach it to the repair order.
3. With the scan tool, read DDM DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - Perform the Stored Lost Communication DTCs diagnostic procedure. Refer to STORED LOST COMMUNICATION DTCS .
CHECK THE LIN BUS CIRCUIT
1. Turn the ignition off.
2. Disconnect the Driver Window/Door Lock Switch C1 harness connector.
3. Turn the ignition on.
4. Measure the voltage between the (D903) Driver Door LIN Bus circuit and the (D512) Driver Door Lin Bus Return circuit in the Driver Window Switch C1 connector.
  Is the voltage above 7.0 volts?
  
  Yes
  - Replace the Driver Window/Door Lock Switch. Refer to SWITCH, POWER WINDOW, REMOVAL AND INSTALLATION .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 3
CHECK THE (D903) DRIVER DOOR LIN BUS CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the Driver Door Module C5 harness connector.
3. Check for continuity between ground and the (D903) Driver Door LIN Bus circuit at the Driver Door Module C5 harness connector.
  Is there continuity between Ground and the (D903) Driver Door LIN Bus circuit?
  
  Yes
  - Repair the (D903) Driver Door LIN Bus circuit for a short to the ground.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 4
CHECK THE (D903) DRIVER DOOR LIN BUS CIRCUIT FOR A SHORT TO THE (D512) DRIVER DOOR LIN BUS RETURN CIRCUIT
1. Check for continuity between the (D903) Driver Door LIN Bus circuit and the (D512) Driver Door LIN Bus Return circuit in the Door Module C5 harness connector.
  Is there continuity between the (D903) Driver Door LIN Bus circuit and the (D512) Driver Door LIN Bus Return circuit in the Door Module C5 harness connector?
  
  Yes
  - Repair the (D903) Driver Door LIN Bus circuit for a short to the (D512) Driver Door LIN Bus Sense Return circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 5
CHECK RELATED HARNESS CONNECTIONS
1. Disconnect all Driver Door Module harness connectors.
2. Disconnect all related in-line harness connections (if equipped).
3. Disconnect the related component harness connectors.
4. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
  - Proper connector installation.
  - Damaged connector locks.
  - Corrosion.
  - Other signs of water intrusion.
  - Weather seal damage (if equipped).
  - Bent terminals.
  - Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
  - Terminals that have been pushed back into the connector cavity.
  - Perform a terminal drag test on each connector terminal to verify proper terminal tension.
  Repair any conditions that are found.
5. Reconnect all Driver Door Module harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
6. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
7. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
8. With the scan tool, erase DTCs.
9. Using the recorded Vehicle Scan Report, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
10. With the scan tool, read DDM DTCs.
  Did the DTC return?
  
  Yes
  - Replace the Driver Door Module in accordance with the Service Information. Refer to MODULE, DOOR (DDM/PDM), REMOVAL AND INSTALLATION .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  - Test complete.